Ever wonder whether you should be using JSON or XML when talking to a server from your mobile app? This paper, presented at the 2104 Transportation Research Board meeting, answers this question by benchmarking against MTA NYC’s SIRI API (hint – its not XML!). Read the full paper for details on the benchmark results, as well as other optimizations you can use to make your app snappy and responsive, and reduce the user’s waiting time for new real-time info. Also view the accompanying poster.